ABS Light On? Causes & What to Check (LA Drivers)

If your ABS or traction control light is on, the most common ABS light on causes are a faulty wheel-speed sensor, a damaged sensor wire or reluctor ring, low brake fluid, or a fault in the ABS module. Because ABS and traction control share sensors, one problem often lights up both. Your regular brakes usually still work, but the anti-lock and traction-control safety features may be disabled until it's fixed. The light won't tell you which part is at fault—only a scan of the system's trouble codes can. The reliable next step is a diagnosis rather than a guess.

What do the ABS and traction control lights mean?

ABS (anti-lock braking system) keeps your wheels from locking up during hard braking so you can still steer. Traction control limits wheel spin when you accelerate on a slick surface. Both rely on the same wheel-speed sensors at each wheel, which is why a single sensor fault often triggers both lights at once.

When the light comes on, the system has detected a fault and usually switches that safety feature off to avoid acting on bad information. Importantly, your normal brakes typically still work—you just lose the anti-lock and traction-control assistance until the fault is repaired.

Because the warning light is generic, it doesn't identify the specific cause. Tire, brake, and engine issues should be diagnosed before parts are replaced, and the same is true here: a scan tool reads the stored trouble codes so the repair targets the real fault. That's where brake system service and inspection comes in.

Quick Answer: What are the common ABS light causes?

The usual culprits behind an ABS or traction control light are:

A faulty wheel-speed sensor — the most common cause.
A damaged sensor wire, connector, or dirty/damaged reluctor (tone) ring.
Low brake fluid or a brake hydraulic issue.
A fault in the ABS control module.
Sometimes a blown fuse or a low battery affecting the system.

Because ABS and traction control share sensors, one bad sensor often lights both. A diagnostic scan identifies which wheel or component is reporting the fault, so you fix the right thing.

What signs come with an ABS or traction control light?

Beyond the dashboard light itself, watch for clues that help point to the cause:

Both ABS and traction control lights on together — often a shared wheel-speed sensor.
The light appears after hitting a pothole — may have disturbed a sensor or wire.
A low brake fluid warning alongside it — points to the hydraulic side.
The light comes and goes — can indicate a wiring or connector issue.
It set after service — a sensor may have been disturbed during other work.

Noting when and how the light appeared helps the shop confirm the cause more efficiently with a scan.

What's likely behind the light? Common causes at a glance

This table summarizes the usual causes and what to do about each.

Likely cause	Typical sign	What to do next	Why it matters
Wheel-speed sensor	Both lights on	Scan codes; inspect sensor	Most common trigger
Sensor wire / tone ring	Light after pothole	Inspect wiring/ring	Bad signal disables ABS
Low brake fluid	Brake light too	Check fluid; inspect	Hydraulic fault possible
ABS module fault	Light stays on	Diagnose module	Controls the whole system
Fuse or battery	Intermittent lights	Check power supply	Power loss trips the system

Some of these are simple, while a module fault is more involved. Because the symptom is identical across causes, a scan is what separates them. Where a sensor or electrical fault is involved, engine and electrical diagnostics help trace the exact source. Accurate diagnosis helps reduce unnecessary repairs and delays.

What causes ABS faults in Los Angeles driving conditions?

Local driving conditions in Echo Park, Silver Lake, and Downtown LA can contribute to the faults that trigger these lights.

Potholes on older streets are a common culprit—a hard impact can disturb a wheel-speed sensor, its wiring, or the reluctor ring, which is why the light sometimes appears right after hitting one. Road grime and brake dust can build up on sensors over time. LA heat is hard on the battery, and a weak battery or electrical issue can occasionally trip these systems. Stop-and-go traffic and frequent braking also work the brake hydraulics. None of this guarantees a fault, but it explains why ABS and traction control lights aren't unusual for LA drivers.

Is it safe to drive with the ABS light on?

In most cases your regular brakes still work with the ABS light on—you simply lose the anti-lock and traction-control assistance. Short, careful driving to reach a shop is often reasonable. But there are important exceptions:

If the regular brake (red) warning light is also on, treat it as more serious and have it checked before driving far—this can indicate a brake fluid or hydraulic problem.
If the brake pedal feels soft, low, or different, stop driving and have it inspected.
In wet conditions, remember that without ABS and traction control, the car can be harder to control during hard braking or on slick roads.

When in doubt, call a shop, describe the lights and how the brakes feel, and confirm whether it's safe to drive in.

What should you check before bringing your car in?

A few observations help the shop diagnose the fault faster. Before your visit, note:

Which lights are on — ABS, traction control, the red brake light, or several.
When the light appeared — after a pothole, in the rain, or after other service.
Whether it's steady or intermittent.
How the brakes feel — normal, soft, or low pedal.
Any recent pothole hits or curb strikes.
Your brake fluid level, if easy to check.
Mileage and any recent brake work.

Sharing these details when you call helps match the right diagnosis to the symptom.

How do you choose a trustworthy auto repair shop in Los Angeles?

Good auto service depends on clear inspection findings, honest recommendations, and matching the repair to the vehicle's needs. With an ABS light, you want a shop that scans the system and identifies the faulty component before replacing parts.

Practical things to look for in a mechanic near Silver Lake or Echo Park:

A clear diagnostic process using a scan tool to read the ABS trouble codes.
Transparent communication about what the codes show before any work.
Recommendations that match the fault — a specific sensor, not a parts-cannon approach.
Quality parts and the correct sensor for your vehicle.
Local experience with pothole-related sensor and wiring damage.
The option to call first and confirm whether it's safe to drive in.

A shop that diagnoses the exact cause protects you from paying to replace good parts. You can see how diagnosis connects to the repair across the shop's full range of auto repair services.

How does Speedway Tire & Service help?

Speedway Tire & Service is a local tire and auto repair shop in Los Angeles, on West Sunset Boulevard, serving drivers in Echo Park, Silver Lake, Downtown LA, Chinatown, Lincoln Heights, and nearby neighborhoods.

When an ABS or traction control light is on, the team can scan the system for trouble codes, inspect the wheel-speed sensors, wiring, and brake hydraulics, and explain what's behind the light in plain language. Because the issue often sits between the brake system and the car's electronics, diagnosis confirms the exact cause before any part is replaced.

Repair scope, timing, and cost are confirmed after the vehicle is reviewed, and the recommended work is shared with you before anything is approved. Timing may vary depending on parts availability, shop workload, and the complexity of the issue, so calling first—especially to confirm whether it's safe to drive in—is a good first step.

Steps to get service from Speedway Tire & Service

Call the shop at (213) 250-4254 or review the services page for what's offered.
Describe which lights are on, when they appeared, and how the brakes feel.
Confirm whether it's safe to drive in, and the right diagnosis.
Bring the car in so the system can be scanned and inspected.
Review the recommended work and estimate before approving it.
Complete the repair and follow any after-service advice.

Frequently Asked Questions about ABS and traction control lights

What are the most common ABS light causes?

The most common cause is a faulty wheel-speed sensor, followed by a damaged sensor wire or connector, a dirty or damaged reluctor (tone) ring, low brake fluid, or a fault in the ABS module. Because ABS and traction control share sensors, one bad sensor often lights both. The warning light itself is generic, so a diagnostic scan that reads the stored trouble codes is the reliable way to identify which component and which wheel are at fault.

Why are my ABS and traction control lights both on?

They share the same wheel-speed sensors, so a single sensor or wiring fault commonly triggers both lights at once. It usually points to a problem at one wheel rather than two separate failures. A scan tool reads the codes to show which wheel and component are reporting the fault, so the repair targets the actual cause. If the red brake warning light is also on, treat it as more urgent and have it checked promptly.

Is it safe to drive with the ABS light on?

Usually your regular brakes still work with only the ABS light on—you lose the anti-lock and traction-control assistance, but normal braking remains. Short, careful driving to a shop is often reasonable. However, if the red brake warning light is also on, the pedal feels soft or low, or you're driving in wet conditions, treat it as more serious and have it inspected before driving far. When unsure, call and describe the lights and brake feel first.

Can a pothole cause my ABS light to come on?

Yes. A hard pothole impact can disturb a wheel-speed sensor, damage its wiring, or affect the reluctor ring, any of which can trigger the ABS or traction control light—which is why the light sometimes appears right after hitting one. LA's older streets make this a common cause locally. If the light came on after a pothole, mention that when you call, since it helps the shop focus the inspection on the affected wheel and sensor.

Will the ABS light cause me to fail a smog or safety check?

An illuminated ABS light generally relates to the anti-lock braking and traction systems rather than emissions, so it isn't the same as a check engine light for smog purposes. That said, requirements vary, and a warning light can be a concern for safety inspections or resale. Regardless of testing, it's worth diagnosing because the light means a safety feature is disabled. A shop can confirm the cause and what it means for your situation.

Do I need an appointment to diagnose an ABS light?

Calling first is the best approach. It lets the shop confirm current availability, advise whether it's safe to drive in based on which lights are on and how the brakes feel, and explain what the diagnostic scan involves. Walk-in availability can change based on shop volume, so a quick phone call helps you avoid waiting and ensures time is set aside to scan the system and identify the faulty component before any repair.

Call Speedway Tire & Service Today

If your dashboard is lit up and you're trying to sort out the ABS light on causes, the reliable next step is a scan that identifies the exact fault rather than guessing. For drivers in Echo Park, Silver Lake, Downtown LA, or nearby neighborhoods, call Speedway Tire & Service at (213) 250-4254, review the services page, or contact the shop to describe the lights and next steps. And if the red brake light is also on or the pedal feels off, have it checked before driving far. Diagnosing the cause restores your safety systems and your peace of mind.